Thermostatic valve.



J. SEREELL L L.. FYFISx THEHMCSTTU VALVE'.

MPMUANUN 1111111 1uNB:1o.1911,

Patented Sept. 8, 1914m E SHEETS SEEET J. A. SERRELL & J. L. PITTS.

THERMOSTATIG VALVE.

APPLICATION FILED JUNE 3o, 1911.

Patented sept;8,1914.

` 2 sums-SHEET z.

Flr'. 7

FIG. 5

attached to the cap and valvepfiece respectively. For this-purpose anannular groove is formed in the metal of the part to which the diaphragm is torbehattached. The edge g* of the diaphragm is bent out for the pur-- pose and is 1nserted in this groove and the metal inside of the groeve is then spun or swaged over the ed e g4. This is shown at'lc, k, in Fig. 1. older may then be applied 'to make the connection hermetically tight.

nstead o attaching the upper diaphragm e directly to the ca d, it is preferably attached to a tubular tnirhble h screwed into afthreaded boss i on the inside of the cap.

`By the adjustment of the thimble h in the 'boss the positionbf the expansion-cell may be adjusted. As/'a convenient means of determining and limiting n the adjustment,

washers j may be inserted between the head ing or cutting' action, and prevents particles lodging between the valve-piece and its seat and preventing the tight closing of the `valve. While we have shown the valve-piece E f4 of spherical shape We do not mean to limit A(il) ourselves to this exact form. f n, n, n; are guides extending from the bese of lthe body c; and arranged 4about the velveseat m, which not to guide the valvepiece to its seat. y

0 is ascreen which is shaped like the frustuin of a shallow' cone with its inner edge supported by the guides n and its outer edge resting on the Ibase o1 the body The sereeu preferablyextends out to the corner of the body a, and While thus firmly supported, and. not liable tube displaced. during the use of the valve, the screen may be easily lifted outwhen the cap and operative parts are removed for the purpose of cleaning.

Between the flange of the cap d and the upper edge of the body o, preferably in a recess p in. the nap, is peeking 7; which preferably consists of e ring of thin copper U-shaped in cross section and filled with asbestos or equivalent.oompressible material s (see Fig. 5). lVhen the Cap is screwed down the asbestos is Vtightly impressed between the layers of copper. The valvemay be made with an expanding member com posed of e plurality of expansion-cells. An expanding member of this nimh sho'gvn in Fig. 8, in Which.two cells are coupled together through the medium of a tubular thimble or coupling It, with which the walls of the cells may be connected by the edges g* in the same manner that they are connected to the thirnble it and valve-piece j.

VV'nat we claim is as follows: l. In a thermostat-ie valve of the character described, the lcombination with a ces ingkhaving an inlet and an outlet, and a valve-piece to i control the thoroughfare through valve, oa removable cap for said casing, and an expansioncell to eentrol said valve1 said cell having the diaphragm forming one of its Walls provided with a central -hole and having the edge of the metalabout said hole inserted-in a groeve in the valve-pieceiand the metal of said valvepiece Within said groove 'spun or svvaged over said inserted 2. In thermostatie valve, the combination' with a casing having en inlet and an outlet and a valve-piece to oontrelthe thm-w oughfa-re through said valve, of anexpansion-cell 1n said 'easing controlling 'saidl valve-piece, and a screen of shallow coneA shape supported in the bottom of said easing and having a central opening for thevalve-` piece. I f

3. In a thermostatic valve,v4 the combina-A tion with a easing'having an inlet and an outlet and a valve-seat, of a valvepieoe adapted to fitsaid seat` upright guides in the casing arrangedA about` said seat and.

adapted to guide the valvepiece, andan ex pension-nell in Saideasing controlling said 5. In a thermostatic valve of the eharaeter described, the combination of a plurality of expansion cells and aconneotingthimble 'uniting adjacent cells together, the edges of `the metal about a central hole in the adjacent Walls of the cells being each in serted in a roove in said. tbiinble and the metal of sai thimble inside of seid groove being spun or swaged over said. inserted edge.

6. ln n thermostatie vali/e` a supporting member having a `groove therein, a valve '100 valve-piece, and a screen of shallow oone shape extending from said guides to the bot- JACMS LOGAN FITTS..

Witnesses as to John A. Serrel: f RUSSELL G. BROWN,

CEAS. J. KOPF. n

Witnesses as tov James L. Fitts:

WILLIAM H. SNYDER,. Primm Y. QUXNN.

hewrespecive ,openings being respe tively gmrni'nge m the groovesof the su Sgam Of' magasver said :Marted 

